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Commitments and Contingencies (Details) - USD ($) $ in Millions | Dec. 29, 2016 | Sep. 30, 2015 | Aug. 20, 2015 | May 02, 2012
--- | --- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |  |
Litigation amount | $ 4.7 |  |  |
Nui Phao Mining Company |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Damages sought |  | $ 167.0 |  |
Judicial Council Of California - Unpaid Fees |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Litigation amount |  |  |  | $ 4.7
Litigation contract amount |  |  | $ 4.7 |
Judicial Council Of California, Disgorged Fees |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Litigation amount |  |  |  | $ 18.3
Litigation contract amount |  |  | $ 18.3 |

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